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SICK LSI Technical Description - 06/98
10.1 LEDs on the LSI
On the LSI and the PLSs there are light-emitting diodes (LEDs)
which deliver important information on the functioning of your
system. Here you can find out what the LEDs indicate.
LEDs on the PLS sensor
Red Yellow Green
ERROR
WEAK/
RES
RES
OSSD
OSSD
A
B
Yellow
Green
Red
Green
Red
Yellow
Yellow
LEDs on the LSI
OSSD
(Green)
OSSD
(Red)
WEAK/ ERROR
(Yellow)
RES
(Yellow)
Status
Protective field free
Object in protective field
Contamination warning *
Contamination *
Fatal error **
Startup testing
Waiting for restart
1 Hz
4 Hz
1 Hz
LSI LEDs:
Green
Red
Yellow
1 Hz
4 Hz
1 Hz
Status
Protective field free
Object in protective field
Contamination warning *
Contamination *
Fatal error **
Startup testing
Waiting for restart
Output levels on LSI:
* Clean front screen of sensor with plastic cleaner and a soft cloth.
** System error: Carry out system diagnosis (see section 9.15).
= LED lit
= LED flashing slowly
1 Hz
= LED flashing rapidly
4 Hz
= Output switches to high
= Output switches to low
= Output switches between high and low
4 Hz
= Output constantly low
PLS LEDs:
Output
OSSD
Output
Warning field
Output
ERROR
4 Hz
Status
Protective field free
Warning field free
Object in protective field
Object in warning field
Contamination warning *
Contamination *
Fatal error **
Startup testing
Waiting for restart
10 Care and Maintenance